Re: [blfs-support] From Core 2 Duo to i7
> On Friday, April 13, 2018 02:15:30 PM Vaclav Masin wrote:> > Hello, > > I've recently bought a new laptop featuring an i7 CPU. I'm wondering what are > the chances of my current LFS-7.10 system compiled on my rather old Core 2 > Duo rig running on this new laptop (provided the kernel is recompiled > accordingly to include the correct drivers). No optimization flags were used > during the build of the system in question. > > I had a read through the 6.3.3 section of The Book's current version and I'm > not quite sure how "same" these two architectures actually are (or are not). > Since it'd be a move from and older architecture to a newer one of the same > vendor, I'd be inclined to believe things might work. But perhaps I'm missing > something (quite possibly in fact) and so an information along the lines of > "no, this will never work" would save me some time and I could start building > a new system straight away. > > Thanks. > > Vaclav Hi, I'd like to just report back briefly that this little adventure of mine seems to have come to a successful end: the system seems stable after the transfer so far. I haven't quite stressed it yet but all the services seem to be starting up without any issues and KDE (plus some extra applications) just as well. Thanks again to all the people above for all the advice and encouragement. Vaclav -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
Re: [blfs-support] From Core 2 Duo to i7
> It is a pure 64-bit system. That should possibly help my case even > further, shouldn't it? In so far as the kernel 64-bit CPU support is rather generic yet. But tread carefully. Pay attention to all glitches. Boot single-user mode, no non-essential "services", with most of your "attachments" unplugged. Then rebuild your kernel for your particular hardware. Explore! Check the GUI. Repeat with "standalone", runlevel 2, and more services. Explore all those and make sure they're functioning right. Only then, runlevel 3. If something is going to go haywire, you want to catch it before it can do damage to all your work--it's faster than having to do that all again! ;-) -- Paul Rogers paulgrog...@fastmail.fm Rogers' Second Law: "Everything you do communicates." (I do not personally endorse any additions after this line. TANSTAAFL :-) -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
Re: [blfs-support] From Core 2 Duo to i7
It is a pure 64-bit system. That should possibly help my case even further, shouldn't it? And thanks a lot for all the promising answers - I think I'm going to give it a try. On Friday, April 13, 2018 02:34:17 PM Paul Rogers wrote: > You didn't mention if you'd made a 32- or 64-bit system. I agree with Bruce. > Matter of fact, I believe I've done it--I had to get *something* running > initially on my i7. Your i7 *should* support all the optimizations present > in the Core-2. > > -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
Re: [blfs-support] From Core 2 Duo to i7
You didn't mention if you'd made a 32- or 64-bit system. I agree with Bruce. Matter of fact, I believe I've done it--I had to get *something* running initially on my i7. Your i7 *should* support all the optimizations present in the Core-2. -- Paul Rogers paulgrog...@fastmail.fm Rogers' Second Law: "Everything you do communicates." (I do not personally endorse any additions after this line. TANSTAAFL :-) -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
Re: [blfs-support] From Core 2 Duo to i7
On 04/13/2018 09:06 AM, Edgar Alwers wrote: Am 13.04.2018 um 14:15 schrieb Vaclav Masin: No optimization flags were used during the build of the system in question. As Hazel Russman just told, gmp may generate problems. I had once a lot porting a system from a PC to a laptop. The problem is, that gmp will use features from the CPU that is present at build time unless you use config.fsf ( See Bruce Dubbs, Re: [blfs-support] Portability problems ? and others) In my case, the ported system was apparently working OK on the laptop, but no configurations or compilations was possible, also of course not the necessary ones for changing gmp. Consider reading the threath with many valuable advices. Actually, I think the proposed port is worth a try. Yes, th ekernel will probably need different drivers, but gmp *should* be portable from an older system to a newer one. -- Bruce -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
Re: [blfs-support] From Core 2 Duo to i7
Am 13.04.2018 um 14:15 schrieb Vaclav Masin: No optimization flags were used during the build of the system in question. As Hazel Russman just told, gmp may generate problems. I had once a lot porting a system from a PC to a laptop. The problem is, that gmp will use features from the CPU that is present at build time unless you use config.fsf ( See Bruce Dubbs, Re: [blfs-support] Portability problems ? and others) In my case, the ported system was apparently working OK on the laptop, but no configurations or compilations was possible, also of course not the necessary ones for changing gmp. Consider reading the threath with many valuable advices. Edgar -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
Re: [blfs-support] From Core 2 Duo to i7
On Fri, 13 Apr 2018 14:15:30 +0200 Vaclav Masin wrote: > Hello, > > I've recently bought a new laptop featuring an i7 CPU. I'm wondering what are > the chances of my current LFS-7.10 system compiled on my rather old Core 2 > Duo rig running on this new laptop (provided the kernel is recompiled > accordingly to include the correct drivers). No optimization flags were used > during the build of the system in question. > > I had a read through the 6.3.3 section of The Book's current version and I'm > not quite sure how "same" these two architectures actually are (or are not). > Since it'd be a move from and older architecture to a newer one of the same > vendor, I'd be inclined to believe things might work. But perhaps I'm missing > something (quite possibly in fact) and so an information along the lines of > "no, this will never work" would save me some time and I could start building > a new system straight away. > > Thanks. > > Vaclav > It's not just the kernel. You'll probably need to recompile gmp, which optimises itself to the architecture it's built on. I once transferred a set of LFS Chapter 5 tools from a desktop machine with an Intel Core Duo to a laptop with a Via Nano, and I got a lot of apparently random segfaults through the early stages of chapter 6. No one could tell me why. But once I had a full local set of primary compilation tools, the crashes stopped. -- -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
[blfs-support] From Core 2 Duo to i7
Hello, I've recently bought a new laptop featuring an i7 CPU. I'm wondering what are the chances of my current LFS-7.10 system compiled on my rather old Core 2 Duo rig running on this new laptop (provided the kernel is recompiled accordingly to include the correct drivers). No optimization flags were used during the build of the system in question. I had a read through the 6.3.3 section of The Book's current version and I'm not quite sure how "same" these two architectures actually are (or are not). Since it'd be a move from and older architecture to a newer one of the same vendor, I'd be inclined to believe things might work. But perhaps I'm missing something (quite possibly in fact) and so an information along the lines of "no, this will never work" would save me some time and I could start building a new system straight away. Thanks. Vaclav -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
